Home / 12,813.21-19,222.80-4,047.90

Finding the Fourth Proportional to 12,813.21, 19,222.80 and 4,047.90

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Solution

The fourth proportional to 12,813.21, 19,222.80 and 4,047.90 is: 6,072.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.21 : 19,222.80 = 4,047.90 : x
  2. Step 2: Convert to fraction form
    12,813.21/19,222.80 = 4,047.90/x
  3. Step 3: Cross multiply
    12,813.21x = 19,222.80 × 4,047.90
  4. Step 4: Simplify right side
    12,813.21x = 77,811,972.12
  5. Step 5: Solve for x
    x = 77,811,972.12/12,813.21
  6. Step 6: Final answer
    x = 6,072.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.